O.S. Engine OSMG0991 110FS-a Pumped 4-Stroke Performance Unit  [OSMG0991]

O.S. Engine 110FS-a 4-Stroke with Pump
Price:
AUD$616.40
Brand:
O.S. Engine
Model:
OSMG0991
Please kindly input your name and email address, we will inform you once we have the restocking.
Or you may find similar product under the
category
Write a review

Introducing the O.S. Engine OSMG0991 110FS-a with PD-08

Offering a combination of usable torque and clean running characteristics, the O.S. Engine OSMG0991 110FS-a 4-Stroke with Pump is built for pilots focused on repeatable performance. The PD-08 pump helps avoid fuel starvation in unusual attitudes, keeping engine output steady.

Why pilots pick the 110FS-a

Modelers rate the 110FS-a for balance between power and reduced oil scatter. The fuel pump and re-lubrication features make it dependable across complex sequences and long flight durations.

Core Features and Benefits

  • Consistent Fueling: PD-08 pump design maintains a stable fuel supply during sharp attitude changes.
  • Oil Recirculation: The re-lubrication system recycles oil to cut down on external deposits and boost component life.
  • High Torque Delivery: Enough torque to drive larger diameter props for models that require increased static thrust.

Specifications

  • Displacement: 1.10 ci (18.0 cc)
  • Bore: 1.20 in (30.4 mm)
  • Stroke: 0.98 in (24.8 mm)
  • Practical RPM: 2,000-11,000 rpm
  • Power Output: 1.8 hp @ 10,000 rpm
  • Engine Weight: 21.52 oz (610 g)
  • Muffler Weight: 2.3 oz (72 g)
  • Includes: 61P carburetor, F-5040 muffler, PD-08 pump

For those flying aerobatic patterns or heavier sport models, the O.S. Engine 110FS-a with Pump provides reliable fueling and a compact service footprint.

You may fine tune the needle settings after installation, but the pump is designed to stabilise supply rather than change base carburetion; check settings at safe test runs.
Perform routine inspections of oil lines and seals, and refresh oil per flight-hour recommendations; keeping the circuit clean preserves pump and bearing life.
Yes, its compact profile and torque make it a fit for certain scale builds, provided the mounting and cooling match the airframe requirements.
Follow a staged break-in with varied throttle settings and check spark and mixture; allow cooling periods to avoid overheating during initial runs.
The pump is serviceable and can be replaced with basic tools; keep spare diaphragms or a spare pump on hand for long events.

Copyright © 2008-2026 rcjaz.com.au All rights reserved